Note there is a difference between 'useable on DCC' and 'DCC controllable'
If you want to operate your trains on DCC and run them onto and off the turntable, no problem. Any turntable is 'Useable on DCC ' in this way. The controls to operate the turntable can be used as supplied by the maker.
For a turntable to be DCC controllable you need to be able to access the drive motor and whatever controls it has for indexing and latching. I am sure this can be done by DCC if you really want to, I can't see any operational benefit from all the work involved. Just because you use DCC it doesn't mean everything must be DCC, look at the cost/benefit equation in each case.
The TT is wired for DC in the sense that the bridge enlivens the relevant stable track when it stops. Your DCC loco lights etc will go out when the bridge moves on. Otherwise it will function perfectly.
To go totally DCC, I would snip the contacts of the dead end stable tracks and wire each stable track together and feed them via a reversing loop module. The contacts hang below each stable track, which is 'clip in'.
The turntable is entirely controllable using DCC and a computer interface, given that you can access the internal wiring. What it lacks is any feedback of position from the turntable to the computer. However, the bridge to stall tracks contacts are accessable.